package com.itheima.dao.impl;

import com.itheima.dao.UserDao;

public class UserDaoImpl implements UserDao {
    @Override
    public void save() {
        System.out.println("无参无返回值save");
    }

    @Override
    public void update() {
        System.out.println("update.......");
        int i = 1 / 0;
    }
}
